Advanced uses of pronouns

I've just been promoted. I'm really proud of ...

(a)  

I still remember the person sitting in front of ... at school.

(a)  

Anyone who has not handed in ... homework yet can do so before lunchtime tomorrow.

(a)  

He really doesn't like company: he prefers travelling ... .... .....

(a)  

Jack and Jill had a big argument and they are not speaking to (a)   any longer.

This cake is delicious. Did you make it (a)   ?

(a)   used to be a park where they built the new shopping centre.

(a)   needs to listen to both sides of a story to find the truth.

... is only ten minutes on foot from my house to the school.

(a)  

While staying at the hotel, we recommend locking the door when a guest leaves (a)   room.